Casselman, PA 15551 Frost Dates
Casselman, PA: when does the frost end?
The last spring frost here typically falls around 04/29, about 244 days from today. Fall's first freeze usually shows up around 10/18, roughly 171 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Casselman in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Casselman's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Casselman against the rest of the dataset
At roughly 171 frost-free days, Casselman places 28,848 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,451 of 2,088.
Learn more
Before leaning on 15551's figures: the frost range explains how to read the range around Casselman's dates instead of trusting one, while local microclimates explains what one yard in Casselman can differ from the 15551 normal.